65621585913 has 32 divisors (see below), whose sum is σ = 104106352896. Its totient is φ = 36354582528.

The previous prime is 65621585873. The next prime is 65621585951. The reversal of 65621585913 is 31958512656.

It is not a de Polignac number, because 65621585913 - 2⁶ = 65621585849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (65621585963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2136420 + ... + 2166917.

It is an arithmetic number, because the mean of its divisors is an integer number (3253323528).

Almost surely, 2^65621585913 is an apocalyptic number.

It is an amenable number.

65621585913 is a deficient number, since it is larger than the sum of its proper divisors (38484766983).

65621585913 is a wasteful number, since it uses less digits than its factorization.

65621585913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4303393.

The product of its digits is 1944000, while the sum is 51.

The spelling of 65621585913 in words is "sixty-five billion, six hundred twenty-one million, five hundred eighty-five thousand, nine hundred thirteen".